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A furnace that operates above atmospheric pressure.

Related Terms

SECONDARY COMBUSTION

Combustion which occurs as a result of ignition at a point beyond the furnace.

UP FLOW FURNACE

A furnace in which the heated air flows upward as it leaves the furnace.

WATER WALL

A row of water tubes lining a furnace or combustion chamber, exposed to the radiant heat of the fire.

AIR DRAFT

The difference between atmospheric pressure and some lower pressure existing in the furnace or gas passages of the steam-generating unit.

DRY BACK

The baffle provided in a firetube boiler joining the furnace to the second pass to direct the products of combustion, that is so constructed to be separate from the pressure vessel and constructed of heat resistant material. (Generally refractory and insulating material)

EXPLOSION DOOR

A door in a furnace or boiler setting designed to be opened by a predetermined gas pressure.

INTERMITTENT FIRING

A method of firing by which fuel and air are introduced and burned in a furnace for a short period after which flow is stopped, this succession occurring in a sequence of frequent cycles.

FLAREBACK

A burst of flame from a furnace in a direction opposed to the normal flow, usually caused by the ignition of an accumulation of combustible gases.

FURNACE EXPLOSION

A violent combustion of dust or gas accumulations in a furnace or combustion chamber of a boiler.

FURNACE

An enclosed space provided for the combustion of fuel.
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